A blonde was pulled over by a female cop, also blonde. The cop asked for her driver's license and, after a couple minutes of looking through her purse, she got frustrated and said to the cop: "I don't even know what it looks like."

The cop said "It's a rectangle, and has your picture on it."
Finally, the blonde found a mirror and handed it to the cop.
The cop handed it back saying "It's OK, you can go. I didn't realize you were a cop."